First execute LTIB (./ltib -c) and select these packages: all gstreamer plugin, alsa-utils and libmad.
Create your file code (i.e.: playmp3.c):
#include <gst/gst.h>
#include <glib.h>
static gboolean
bus_call (GstBus *bus,
GstMessage *msg,
gpointer data)
{
GMainLoop *loop = (GMainLoop *) data;
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_EOS:
g_print ("End of stream\n");
g_main_loop_quit (loop);
break;
case GST_MESSAGE_ERROR: {
gchar *debug;
GError *error;
gst_message_parse_error (msg, &error, &debug);
g_free (debug);
g_printerr ("Error: %s\n", error->message);
g_error_free (error);
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
int
main (int argc,
char *argv[])
{
GMainLoop *loop;
GstElement *pipeline, *source, *decoder, *conv, *resample, *sink;
GstBus *bus;
/* Initialisation */
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* Check input arguments */
if (argc != 2) {
g_printerr ("Usage: %s <MP3 filename>\n", argv[0]);
return -1;
}
/* Create gstreamer elements */
pipeline = gst_pipeline_new ("audio-player");
source = gst_element_factory_make ("filesrc", "file-source");
decoder = gst_element_factory_make ("mad", "mp3-decoder");
conv = gst_element_factory_make ("audioconvert", "converter");
resample = gst_element_factory_make ("audioresample", "audio-resample");
sink = gst_element_factory_make ("autoaudiosink", "audio-output");
if (!pipeline || !source || !decoder || !conv || !resample || !sink) {
g_printerr ("One element could not be created. Exiting.\n");
return -1;
}
/* Set up the pipeline */
/* we set the input filename to the source element */
g_object_set (G_OBJECT (source), "location", argv[1], NULL);
/* we add a message handler */
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_watch (bus, bus_call, loop);
gst_object_unref (bus);
/* we add all elements into the pipeline */
/* file-source | mp3-decoder | converter | resample | alsa-output */
gst_bin_add_many (GST_BIN (pipeline),
source, decoder, conv, resample, sink, NULL);
/* we link the elements together */
/* file-source -> mp3-decoder -> converter -> resample -> alsa-output */
gst_element_link_many (source, decoder, conv, sink, NULL);
/* Set the pipeline to "playing" state*/
g_print ("Now playing: %s\n", argv[1]);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
/* Iterate */
g_print ("Running...\n");
g_main_loop_run (loop);
/* Out of the main loop, clean up nicely */
g_print ("Returned, stopping playback\n");
gst_element_set_state (pipeline, GST_STATE_NULL);
g_print ("Deleting pipeline\n");
gst_object_unref (GST_OBJECT (pipeline));
return 0;
}
Create a directory inside your ltib directory to compile your source code:
$ mkdir ~/your-ltib-dir/rpm/BUILD/gst
Enter on LTIB shell mode:
$ ./ltib -m shell
Entering ltib shell mode, type 'exit' to quit
LTIB>
Enter in your application dir:
LTIB> cd rpm/BUILD/gst/
Compile your application:
LTIB> gcc -Wall $(pkg-config --cflags --libs gstreamer-0.10) playmp3.c -o playmp3
If everything worked file you will get a "playmp3" arm binary:
LTIB> file playmp3
playmp3: ELF 32-bit LSB executable, ARM, version 1 (SYSV), for GNU/Linux 2.6.14, dynamically linked (uses shared libs), not stripped
Now just copy it to ~/your-ltib-dir/rootfs/home.
Start your board using this rootfs and execute:
root@freescale ~$ cd /home/
root@freescale /home$ ./playmp3 your-file.mp3
Now playing: your-file.mp3
Running...
I have tried to compile this application for i.MX6Q and it's compiling but not running properly.
When I run the application I get the following message and there is no output on the display:
/playvideo clipcanvas_14348_offline.mp4
this is powerful mx6q
MFW_GST_V4LSINK_PLUGIN 3.0.1 build on Nov 30 2012 15:01:54.
(playvideo:2088): GLib-GObject-WARNING **: g_object_set_valist: object class `GstVpuDec' has no property named `codec-type'
Now playing: clipcanvas_14348_offline.mp4
[INFO] Product Info: i.MX6Q/D/S
vpudec versions :smileyhappy:
plugin: 3.0.1
wrapper: 1.0.24(VPUWRAPPER_ARM_LINUX Build on Nov 30 2012 14:55:19)
vpulib: 5.4.6
firmware: 2.1.5.32515
Running...
Can you please suggest the changes needed for i.MX6Q ?
Please not the command line is working fine:
gst-launch filesrc location=big_buck_bunny.mp4 typefind=true ! aiurdemux ! vpudec ! mfw_v4lsink
Works !